Plant support



FIG. 1 is a reduced perspective view of the plant support showing my new design, the window and flower pots being shown in broken lines for illustrative purposes only;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front elevational view thereof; and

FIG. 4 is a top plan view thereof. 

The ornamental design for a plant support, as shown and described. 